Oceans

What do ship captains use to help them know when it is safe to dock at the ocean's edge?

More Questions from Oceans
The giant triton is a marine snail that can reach what size?
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Which of these oceans remains frozen throughout most of the year?
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What fish is named for its long, sharp, toothless jaw?
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What is the minimum threshold for the depth of a deepwater operation?
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Easter Island is an island in what ocean?
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The tongue of a blue whale is approximately the same size as which of the following other animals?
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How old was the Captain of the Titanic when it went down?
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Where in the ocean would you find lobsters living?
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